Improvement in hoisting-jacks



A; GORRELL. Hoisting-Jack.

No. 214.249. Patented April 15,1879.

FIGl. FIG. 2.

WITNESSES I EJV'TQR N-PETERS. PHOTGLITHOGRAPHER. WASHINGTON D O UNITEDSTATES PATENT OFFICE.

ALBERT GORRELL, OF HOLMESVILLE, OHIO.

IMPROVEMENT IN HOISTING-JACKS.

Specification forming part of Letters Patent No. 214,249, dated April15, 1879; application filed February 26, 1879.

To all whom it may concern:

Be it known that I. ALBERT GoRRELL, of Holinesville,in the county ofHolmes and State of Ohio, have invented certain new and usefulImprovements in Hoisting-Jacks; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, and

' to the letters of reference marked thereon,

which form a part of this specification.

This invention consists in the construction and arrangement of theseveral parts hereinafter fully set forth.

In the drawings, Figure 1. is a side elevation; Fig. 2, an endelevation. Fig. 4 is a reverse side elevation, and Figs. 3 and 5 aredetail views.

a is the main or fulcrum post, provided with a series of holes, a. It ismortised into the sill b, and is set i'n'a slightly-inclined position,as shown.

c is the brace and ratchet bar or post, havin g its lower end set in thesill I), while its upper end is firmly attached to the upper end of themain bar a, and it has cut in its edge next the bar a the series ofnotches c, for holding the loop 01 formed on one end of the stay-rod d,the opposite end of which is affixed to the lever e, as shown.

f is an adjustable fulcrum, which slides up and down on the post a. Itis provided with the pin f, on which the lever e is fixed. It has therear projecting side plates f f which fit against the edges of the posta, and which have the lugs f f which project above the upper end of thefulcrum-plate f and backward, and are connected by the cross-bar j,which fits snugly against the rear side of the post a. By reason of thisconstruction the fulcrum may be turned outward from the post a,withdrawing the retaining-pin f from its hold in one of the holes a, asshown in Fig. 2, and maybe slipped up or down and adjusted to the heightof the weight to be lifted.

When the lever e is pressed down the loop d of the rod at will catch inthe notches c and hold the weight on the end of the lever stationary inposition.

I claim as my invention- 1. The improved lifting-jack, consisting of thebars a and c and sill b, lever e, stay-rod d, and loop d, and thefulcrum-plate f, having the pins f f, lugs f and cross-bar f constructedand arranged substantially as set forth.

2. In a lifting-jack having a post or bar, a, with retaining-holes a,the adjustable fulcrum f, having side plates f lugs f projectingbackward and upward above the upper end of the plate f, and connected bythe cross-barf, and provided with the retaining-pin f andlever-supporting pin f substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

ALBERT GORRELL.

Witnesses:

JOSIAH MARTIN, JOHNSON MORELAND.

